Sökning: "laser diagnostics"

Visar resultat 16 - 20 av 25 uppsatser innehållade orden laser diagnostics.

1. 16. CO and CO2 Detection for Catalysis Diagnosis by Means of PLIF

   Magister-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Förbränningsfysik

   Författare :Sebastian Pfaff; [2017]
   Nyckelord :plif; laser diagnostics; catalysis; carbon monoxide; carbon dioxide; palladium; planar laser induced fluorescence; Physics and Astronomy;

   Sammanfattning : In order to fully understand the underlying processes of catalysis, it is vital to combine measurements of the catalyst surface, where the reaction occurs, with measurements of the gas concentration close to the catalyst. We have developed a convenient setup, which uses a single laser system to visualise the gas surrounding a working catalyst in situ at realistic operating conditions. LÄS MER

3. 17. Investigation of phase conjugation for medical imaging

   Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

   Författare :Ivan Sytcevich; [2017]
   Nyckelord :Phase conjugation; Ultrasound Optical Tomography; Rare-Earth-Doped Crystals.; Physics and Astronomy;

   Sammanfattning : With the development of extremely precise spectral filters based on spectral hole burning and slow light effects, the idea of their implementation in an Ultrasound Optical Tomography (UOT) medical imaging technique arose. Simulations have shown that the resulting Contrast-to-Noise (CNR) ratio is fairly good at depths up to 5 cm but decreases dramatically when probing deeper in tissue. LÄS MER

4. 18. Implementing a Probe with Laser Doppler and Heater

   Kandidat-uppsats, Linköpings universitet/Elektroniska Kretsar och System

   Författare :Karin Marneson; [2017]
   Nyckelord :;

   Sammanfattning : With laser Doppler flowmetry, blood flow can be measured in the smallest blood vessels in the body. Perimed AB is a company that develops instruments for microvascular diagnostics and want to develop a 15-mm probe with laser Doppler and heater. LÄS MER

5. 19. High Accuracy Relative Luminescence Quantum Yield Measurements of Upconverting Nanoparticles

   Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

   Författare :Björn Thomasson; [2016]
   Nyckelord :Upconverting Nanoparticles; Biomedical imaging; Luminescence tomography; Luminescence imaging; Engineering; Physics; Engineering Physics; Photonics; Cancer; Cancer detection; Cancer diagnostics; Laser Engineering; quantum yield; imaging; upconverting; Biophotonics; Single Point Tomography; Relative Luminescence Quantum Yield Measurements; Energy transfer upconversion; Nanoscience; Luminescence; Imaging of biological tissue; Upconversion; Beam profile evaluation; Beam profile; UCNP; UCNPs; Nanoparticles; Technology and Engineering;

   Sammanfattning : The name Upconverting nanoparticles refers to a novel category of luminescence emitters that are capable of generating visible luminescence upon excitation with noncoherent and longer wavelength monochromatic near-infrared light, at excitation fluence rates as low as 1-103 W/cm2. This unique optical behaviour is of great interest to researchers as it could potentially allow for virtually autofluorescence free luminescence imaging of living tissue. LÄS MER

7. 20. Reproducibility of bunches of electrons accelerated in laser driven wakefields

   Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Författare :Philip Siederer; [2016]
   Nyckelord :Laser; wakefield; acceleration; electron acceleration; plasma; LWFA; Physics and Astronomy;

   Sammanfattning : Laser wakefield acceleration (LWFA) utilises a high intensity laser pulse to excite a plasma density wave with associated large directed electric fields. These large electric fields can be used to accelerate electrons, making LWFA a good candidate for a compact electron beam source. LÄS MER